| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| O-苯基-N-叔丁基羰基-L-酪氨酸 | N-benzyloxycarbonyl-O-benzyl-L-tyrosine | 16677-29-5 | C24H23NO5 | 405.45 | 
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| —— | benzyl N-[(2S)-1-(cyanomethylamino)-1-oxo-3-(4-phenylmethoxyphenyl)propan-2-yl]carbamate | 119140-69-1 | C26H25N3O4 | 443.502 | 
Syntheses are described of four peptides with modified leucine-enkephalin sequences in which the native glycylglycyl segment is replaced by an ω-amino acid residue. o-Nitrophenylthio-ω-amino acids were used as intermediates, and it was found that the derivatives of 4-aminobutyric and 5-amino-valeric acids undergo facile intramolecular cyclization under the influence of N,N'-dicyclohexylcarbodiimide.